When something is dying it is not completely dead. Only half or almost there. I need a word that means gaining life, as in almost completely alive. Like the reverse of dying. When you die the flame of life dims and burns out. I'm looking for a dim light that increases its intensity as fuel is added. I can think of perfectly good antonyms like waning, dimming, dwindle, ebbing, fading, but not many synonyms. It doesn't sound right.
It's a weird description, but it doesn't have to necessarily be about life. Maybe light, or fire or anything. Does such a word exist? If not, is there any word or several words that sound like this?